Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users may be unable to upload background images larger than 1800×1800 during Microsoft Teams meetings – ONGOING

Announcements Sourav Nandi

28/03/2025 08:02:00 AM

NHSmail Reference: INC46488990

Microsoft Reference: TM1040294

Issue Status: ONGOING

Issue Description: Users may be unable to upload background images larger than 1800×1800 during Microsoft Teams meetings.

More info: When attempting to upload a background image larger than 1800×1800, users receive an error message stating “invalid image size” and the upload fails. Users can avoid this issue by resizing the desired image to below the aforementioned dimensions.

Current Update: 28/03/2025 08:02:00 AM – Microsoft’s fix to revert the strict size check logic has been validated and they’re expecting deployment to start by Monday, March 31, 2025, which is when they anticipate providing an updated timeline for impact remediation.

Scope of impact: This issue may affect any user attempting to upload a background image larger than 1800×1800 during any Microsoft Teams meeting.

Root cause: A recent change instituted a restriction on image size for background image uploads in Microsoft Teams.

Next update by: Monday, March 31, 2025, at 11:00 PM UTC